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[ SEMICONDUCTOR DEVICES AND ASSEMBLIES THEREOF; ASSEMBLIES OF SEMICONDUCTOR DEVICES AND COOLING STRUCTURES IN THE FORM OF MOUNTINGS FOR THYRISTORS, DIODES OR TRANSISTORS PROVIDING COOLING BY NATURAL OR FORCED FLOW OF AIR OR LIQUID THROUGH OR OVER THE STRUCTURE; ] ELECTRICAL AND ELECTRONICS SUPERVISORY CONTROL UNITS FOR THYRISTORS, DIODES OR TRANSISTORS; ELECTRICAL POWER SUPPLY APPARATUS USING SUCH THYRISTORS, DIODES OR TRANSISTORS, INCLUDING CURRENT RECTIFIERS, HIGH VOLTAGE D.C. SUPPLIES, PLATING AND ELECTRO-FINISHING SUPPLY SETS AND BATTERY CHARGERS, [ AUTOMATED ELECTRONIC, SUPERVISORY CONTROL APPARATUS BY WHICH THE ACCELERATION AND DECELERATION AND/OR ROUTING OF VEHICLES OR TRAINS OF VEHICLES IS CONTROLLED IN ACCORDANCE WITH GOVERNING CONDITIONS, ] DATA LOGGING AND DATA TRANSMISSION AND RECEPTION APPARATUS FOR USE IN CONTROL OF PIPELINES, GAS AND ELECTRICAL DISTRIBUTION NETWORKS, MACHINERY, ETC. [ ; AND PARTS AND FITTINGS THEREFOR ]